"I have taken Premarin in the 1.25 strength for over 40 years, it has not stopped the hot flashes and night sweats but it reduces them by at least 50%. I do not have osteoporosis (my Mother and all of my Aunts did) and my bone density is better than most women half my age, a lot of which I attribute to the Premarin. I have never taken prempro or any progestin product, just the Premarin alone.  I tried the half strength, miserable with all day hot flashes so over heated looked like I had a sunburn with heat rash and nasty skin breakouts, so I changed Drs, now back to the 1.25 strength. . My only complaint is that a product like this that ha been on the market over 50 years I do not understand why there is no generic as it is very expensive."